State profile · Near national median SD

Illinois bridge safety

Condition ratings, load ratings, and structural-deficiency data for every public highway bridge in Illinois — drawn straight from the FHWA National Bridge Inventory.

27,743
Public bridges
41.2%
Good condition
7.9%
Poor condition
7.9%
Structurally deficient

Total Bridges

27,743

Public highway bridges in Illinois

Good Condition

41.2%

11,426 bridges rated 7-9

-8.8pp vs 50% benchmark

Poor Condition

7.9%

2,186 bridges rated 0-4

Structurally Deficient

7.9%

2,186 bridges flagged for repair priority

0.9pp vs national avg 7.0%

Illinois vs national bridge condition

Illinois — Good condition share 41.2%
National avg

Share of bridges rated 7-9 on the FHWA 0-9 scale (deck, superstructure, substructure all good).

Illinois — Structurally deficient share 26.3%
National avg

Lower is better. Bar maxes at 30% (worst-state ceiling). National average sits at 7.0%.

Condition Distribution

Bridge inventory deck-condition mix — Illinois (FHWA NBI)

Illinois41.185163825109036%36.47046101719353%7.879465090293047%7.879465090293047%GoodFairPoorStructurally Deficient
Bridge inventory deck-condition mix — Illinois (FHWA NBI)

Counties (102)

Adams 325 Alexander 96 Bond 165 Boone 111 Brown 71 Bureau 382 Calhoun 81 Carroll 185 Cass 77 Champaign 743 Christian 323 Clark 232 Clay 171 Clinton 187 Coles 308 Cook 2185 Crawford 196 Cumberland 169 De Witt 197 DeKalb 264 Douglas 234 DuPage 380 Edgar 278 Edwards 79 Effingham 260 Fayette 356 Ford 300 Franklin 323 Fulton 210 Gallatin 82 Greene 166 Grundy 269 Hamilton 164 Hancock 291 Hardin 58 Henderson 144 Henry 331 Iroquois 565 Jackson 235 Jasper 180 Jefferson 270 Jersey 111 Jo Daviess 198 Johnson 120 Kane 354 Kankakee 352 Kendall 133 Knox 321 LaSalle 529 Lake 286 Lawrence 183 Lee 372 Livingston 578 Logan 296 Macon 368 Macoupin 248 Madison 543 Marion 301 Marshall 153 Mason 85 Massac 138 McDonough 210 McHenry 229 McLean 624 Menard 90 Mercer 162 Monroe 130 Montgomery 261 Morgan 241 Moultrie 171 Ogle 377 Peoria 365 Perry 139 Piatt 249 Pike 338 Pope 86 Pulaski 106 Putnam 50 Randolph 155 Richland 147 Rock Island 256 Saline 176 Sangamon 480 Schuyler 121 Scott 96 Shelby 330 St. Clair 502 Stark 89 Stephenson 332 Tazewell 361 Union 192 Vermilion 515 Wabash 88 Warren 202 Washington 232 Wayne 264 White 210 Whiteside 280 Will 674 Williamson 204 Winnebago 475 Woodford 222

Illinois vs nearby ranks

Adjacent states on the structurally deficient leaderboard (lower share = better)

States are ranked by share of bridges flagged structurally deficient — the FHWA classification for any span where deck, superstructure, or substructure carries a condition rating of 4 or below. Lower percentages indicate stronger maintenance funding and inspection follow-through. States here sit immediately above and below Illinois on the same metric.

44

Rhode Island

7.69% top marginal rate
Structure
Progressive
Burden @ $100K
$78

31

Nebraska

7.73% top marginal rate
Structure
Progressive
Burden @ $100K
$15,571
Selected

17

Illinois

7.88% top marginal rate
Structure
Progressive
Burden @ $100K
$27,743

25

Massachusetts

7.96% top marginal rate
Structure
Progressive
Burden @ $100K
$5,314

29

Missouri

8.53% top marginal rate
Structure
Progressive
Burden @ $100K
$24,654

Bridges Needing Most Attention in Illinois

Six lowest-condition bridges in Illinois, ranked by composite NBI rating. Each is inspected at least every 24 months.

FAS 1599

Poor

Over: DRAINAGE CANAL

2.2 MI E MEYER, Adams, IL

Built 1980 Load: 0.6 t ADT: 200

CH 15

Poor

Over: E FK MAZONRIVER

0.05 MI W CH 16, Grundy, IL

Built 1977 Load: 1.0 t ADT: 1,400

MOOSE RD - TR 240

Structurally Deficient

Over: WILSON CREEK

NE-35-T3NR2E, Fulton, IL

Built 1935 Load: 1.3 t ADT: 10

TR 10-B

Structurally Deficient

Over: KING CREEK

W EDGE OF MINERAL, Bureau, IL

Built 1899 Load: 1.6 t ADT: 10

TR-6

Structurally Deficient

Over: DRAINAGE DITCH

3.5 MI NE DIETERICH, Effingham, IL

Built 1909 Load: 1.6 t ADT: 25

TR208K(TWIN BRIDGE

Structurally Deficient

Over: BIG CREEK

NE EDGE MT ZION, Macon, IL

Built 1967 Load: 1.9 t ADT: 375

All Bridges in Illinois

CH 55(FAS 644)

Unknown

Over: I-72

1 MI S OF NIANTIC, Macon, IL

Built 1976 ADT: 14,800

CH 27(FAS 551)

Unknown

Over: I-72

1 MI SW HARRISTOWN, Macon, IL

Built 1976 ADT: 14,800

FAU 7351

Unknown

Over: I-72

1 MI S HARRISTOWN, Macon, IL

Built 1976 ADT: 14,800

I-72 (EB)

Unknown

Over: FAP 323 WB(US 36)

IN HARRISTOWN, Macon, IL

Built 1976 ADT: 4,350

I-72 (EB)

Unknown

Over: FAP 322A(US 51 SB)

IN HARRISTOWN, Macon, IL

Built 1976 ADT: 4,500

I-72(WB) & US 51(S

Unknown

Over: FAU 7381

N EDGE HARRISTOWN, Macon, IL

Built 1976 ADT: 2,750

I-72(EB) & US 51(N

Unknown

Over: FAU 7381(HARSTWN BLV

N EDGE HARRISTOWN, Macon, IL

Built 1976 ADT: 2,750

I-72 (WB)

Unknown

Over: TR 117 NS RR

1 MI N HARRISTOWN, Macon, IL

Built 1976 ADT: 50

I-72 (EB)

Unknown

Over: TR 117 NS RR

1 MI N HARRISTOWN, Macon, IL

Built 1976 ADT: 50

CH 41(FAS 1538)

Unknown

Over: I-72

2 MI N HARRISTOWN, Macon, IL

Built 1976 ADT: 14,000

FAU 7354 S.ELIZABE

Unknown

Over: I-72

.5 MI S ILL-121 INT, Macon, IL

Built 1976 ADT: 14,000

I-72 (EB)

Unknown

Over: FA320 (IL-121) & CN RR

1.5 MI NW DECATUR, Macon, IL

Built 1976 ADT: 7,600

I-72 (WB)

Unknown

Over: FA320 (IL-121) & CN RR

1.5 MI NW DECATUR, Macon, IL

Built 1976 ADT: 7,600

FAU 7431(OAKLAND A

Unknown

Over: I-72

N EDGE OF DECATUR, Macon, IL

Built 1976 ADT: 12,800

I-72 (EB)

Unknown

Over: IL-48 & DECATUR CENTRALR

2.5 MI E FORSYTH, Macon, IL

Built 1974 ADT: 7,600

I-72 (WB)

Unknown

Over: IL-48 & DECATUR CENTRALR

2.5 MI E FORSYTH, Macon, IL

Built 1974 ADT: 7,600

TR 45(KIRBY RD)

Unknown

Over: I-72

NE OF DECATUR, Macon, IL

Built 1975 ADT: 11,500

CH 20(FAS 549B)

Unknown

Over: I-72

1 MI E OF OREANA, Macon, IL

Built 1975 ADT: 11,500

FAS 544(CH 25)

Unknown

Over: I-72

ARGENTA INTERCHANGE, Macon, IL

Built 1975 ADT: 11,900

TR 270(CEMETERY RD

Unknown

Over: I-72

.5 MI SE ARGENTA, Macon, IL

Built 1975 ADT: 11,900

I-72 (EB)

Unknown

Over: FAS1536 DECATUR CENTRALR

1.5 MI NE ARGENTA, Macon, IL

Built 1975 ADT: 750

I-72 (WB)

Unknown

Over: FAS1536 DECATUR CENTRALR

1.5 MI NE ARGENTA, Macon, IL

Built 1975 ADT: 750

CH 18(SCHOOL RD)

Unknown

Over: I-72

1.5 MI W OF CO LINE, Macon, IL

Built 1975 ADT: 11,900

FAP 322(NB) (US 5

Unknown

Over: BS-51 & DECATUR CENTRALR

1 MI S OF DECATUR, Macon, IL

Built 1976 ADT: 6,350

FAP 322(SB) (US 51

Unknown

Over: BS-51 & DECATUR CENTRALR

1 MI S OF DECATUR, Macon, IL

Built 1976 ADT: 6,350

FAU 7421

Unknown

Over: FAP 322A(US 51)

1 MI SW OF DECATUR, Macon, IL

Built 1976 ADT: 5,900

FAP 322(NB) (US 5

Unknown

Over: FAU 7426(TAYLOR RD)

1 MI S OF DECATUR, Macon, IL

Built 1976 ADT: 275

FAP 322(SB) (US 5

Unknown

Over: FAU 7426(TAYLOR RD)

1 MI S OF DECATUR, Macon, IL

Built 1976 ADT: 275

FAP 323(WB)(US 36)

Unknown

Over: FAP 322 (US 51)

IN HARRISTOWN, Macon, IL

Built 1976 ADT: 4,500

FAP 323(EB)(US 36)

Unknown

Over: FAP 322(US 51)

IN HARRISTOWN, Macon, IL

Built 1976 ADT: 5,900

FAP 322(SB)(US 51)

Unknown

Over: IL-48 & NS RR

.5 MI SW OF DECATUR, Macon, IL

Built 1978 ADT: 4,550

FAP 322(NB)(US 51)

Unknown

Over: IL-48 & NS RR

.5 MI SW OF DECATUR, Macon, IL

Built 1978 ADT: 4,550

NS RR

Unknown

Over: FAU 7429(IL 48)

FAIRVIEW(DECATUR), Macon, IL

Built 1992 ADT: 13,500

FAP 710(NB BS RT 5

Unknown

Over: FAP 322(US 51)

2 MI S OF ELWIN, Macon, IL

Built 1994 ADT: 2,700

TR 114B(RILEY RD)

Unknown

Over: FAP 322(US 51)

2 MI S OF ELWIN, Macon, IL

Built 1994 ADT: 2,700

FAS 552(CH 30)

Unknown

Over: FAP 322(US 51)

.5 MI E OF ELWIN, Macon, IL

Built 1994 ADT: 2,700

FAP 323(US 36)

Unknown

Over: FAU 7429(IL 48)

IN DECATUR, Macon, IL

Built 1998 ADT: 13,500

FAP 322(US 51)

Unknown

Over: I-72

S EDGE FORSYTH, Macon, IL

Built 2011 ADT: 12,300

N&W RR

Unknown

Over: BRUSH COLLEGE(U 7448

0.3 MI S OF FAU 7369, Macon, IL

Built 1932 ADT: 8,850

N&W RR

Unknown

Over: BRUSH COLLEGE(U 7448

0.33 M S OF FAU 7369, Macon, IL

Built 1932 ADT: 8,850

GARFIELD AV(FAU 73

Unknown

Over: IL 121(FAP 320)

1.54 MI E OF US 51, Macon, IL

Built 1965 ADT: 15,400

N&W RR

Unknown

Over: MONROE ST(FAU 7432)

0.1 MI N OF US 36, Macon, IL

Built 1900 ADT: 7,600

RR SWITCH YARDS

Unknown

Over: JASPER ST(FAU 7439)

1 BLOCK N US 36, Macon, IL

Built 1900 ADT: 8,100

RR SWITCH YARDS

Unknown

Over: JASPER ST(FAU 7439)

1 BLOCK N US 36, Macon, IL

Built 1900 ADT: 8,100

N&S RR

Unknown

Over: MAIN ST(FAU 7386)

SW DECATUR, Macon, IL

Built 1900 ADT: 3,650

N&S RR

Unknown

Over: TR 42(NEVADA RD)

1.0 MI W OF BOODY, Macon, IL

Built 1900 ADT: 75

IC RR

Unknown

Over: LINCOLN PKRD(U 7392)

W LAKE SHORE BR, Macon, IL

Built 1900 ADT: 100

IC RR

Unknown

Over: PRAIRIE ST(FAU 7385)

E OF BROADWAY, Macon, IL

Built 1915 ADT: 1,650

N&S RR

Unknown

Over: SUNSET AVE(MS 2480B)

IN DECATUR, Macon, IL

Built 1900 ADT: 275

N&S RR

Unknown

Over: FOREST AVE(MS 2450A)

EAST OF ILL 48, Macon, IL

Built 1900 ADT: 450

Showing 2,551-2,600 of 27,743 bridges

Related

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Data sourced from the FHWA National Bridge Inventory (NBI), latest released cycle. See our methodology for details. Retrieved and formatted by PlainBridges Editorial.

Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from the FHWA National Bridge Inventory (NBI). A "structurally deficient" rating is a repair-priority signal, not a closure or unsafe-to-cross designation. Consult a qualified civil engineer before making decisions based on this data.

Understanding Bridge Conditions

How FHWA rates bridge condition on a 0-9 scale.

Check Your Daily Bridges

How to look up bridge condition data for bridges on your route.

Read our methodology — how this data is sourced, computed, and verified.